Add external medias package

src/internal/external_medias/external_medias.go

@@ -0,0 +1,62 @@
+package extmedias
+
+import (
+	"github.com/jmoiron/sqlx"
+	"gitlab.quimbo.fr/odwrtw/canape-sql/src/internal/sqly"
+)
+
+const (
+	addExternalMediaQuery    = `INSERT INTO external_medias (type, source, category, ids) VALUES ($1, $2, $3, $4) RETURNING id;`
+	updateExternalMediaQuery = `UPDATE external_medias SET type=:type, source=:source, category=:category, ids=:ids WHERE id=:id RETURNING *;`
+
+	deleteExternalMediaQuery = `DELETE FROM external_medias WHERE id=:id;`
+	getExternalMediaQuery    = `SELECT * FROM external_medias WHERE type=$1 AND source=$2 AND category=$3 LIMIT 1;`
+)
+
+// Media represents an external media
+type Media struct {
+	sqly.BaseModel
+	Type     string           `db:"type"`
+	Source   string           `db:"source"`
+	Category string           `db:"category"`
+	IDs      sqly.StringSlice `db:"ids"`
+}
+
+// Add adds the Media in the database
+func (m *Media) Add(q sqlx.Queryer) error {
+	var id string
+	err := q.QueryRowx(addExternalMediaQuery, m.Type, m.Source, m.Category, m.IDs).Scan(&id)
+	if err != nil {
+		return err
+	}
+	m.ID = id
+	return nil
+}
+
+// Update ids only updates the IDs of the media
+func (m *Media) Update(ex *sqlx.DB) error {
+	rows, err := ex.NamedQuery(updateExternalMediaQuery, m)
+	if err != nil {
+		return err
+	}
+	for rows.Next() {
+		rows.StructScan(m)
+	}
+	return nil
+}
+
+// Delete the media from database or raise an error
+func (m *Media) Delete(ex *sqlx.DB) error {
+	_, err := ex.NamedExec(deleteExternalMediaQuery, m)
+	return err
+}
+
+// Get gets a media
+func Get(q sqlx.Queryer, mtype, msrc, mcat string) (*Media, error) {
+	m := &Media{}
+	if err := q.QueryRowx(getExternalMediaQuery, mtype, msrc, mcat).StructScan(m); err != nil {
+		return nil, err
+	}
+
+	return m, nil
+}

src/internal/external_medias/external_medias_test.go

@@ -0,0 +1,75 @@
+package extmedias
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+	"testing"
+
+	_ "github.com/mattes/migrate/driver/postgres"
+	"gitlab.quimbo.fr/odwrtw/canape-sql/src/internal/sqly"
+
+	"github.com/jmoiron/sqlx"
+)
+
+var db *sqlx.DB
+var pgdsn string
+
+func init() {
+	var err error
+
+	pgdsn = os.Getenv("POSTGRES_DSN")
+	db, err = sqlx.Connect("postgres", pgdsn)
+
+	if err != nil {
+		fmt.Printf("Unavailable PG tests:\n    %v\n", err)
+		os.Exit(1)
+	}
+}
+
+func TestAddExternalMedias(t *testing.T) {
+	sqly.RunWithLastestMigration(db, pgdsn, t, func(db *sqlx.DB, t *testing.T) {
+		media := &Media{
+			Type:     "movie",
+			Source:   "trakttv",
+			Category: "trending",
+			IDs:      []string{"1", "2", "3"},
+		}
+
+		// Add it
+		if err := media.Add(db); err != nil {
+			t.Fatalf("failed to add external media: %q", err)
+		}
+
+		// Update the IDs
+		media.IDs = []string{"1", "2", "3", "4"}
+		if err := media.Update(db); err != nil {
+			t.Fatalf("failed to update the external media: %q", err)
+		}
+
+		// Find it
+		m, err := Get(db, media.Type, media.Source, media.Category)
+		if err != nil {
+			t.Fatalf("failed get the external media: %q", err)
+		}
+
+		// Small, almost useless check
+		if len(m.IDs) != 4 {
+			t.Fatalf("the media should have 4 ids, only %d found", len(m.IDs))
+		}
+
+		// Delete it
+		if err := media.Delete(db); err != nil {
+			t.Fatalf("failed to delete the external media: %q", err)
+		}
+
+		// Search it and expect that it's not found
+		m, err = Get(db, media.Type, media.Source, media.Category)
+		if err == nil {
+			t.Fatal("there should be an error, was the external media deleted ?")
+		}
+		if err != sql.ErrNoRows {
+			t.Fatalf("unexpected error: %q", err)
+		}
+	})
+}

src/internal/sqly/string_slice.go

@@ -0,0 +1,58 @@
+package sqly
+
+import (
+	"database/sql/driver"
+	"encoding/csv"
+	"errors"
+	"regexp"
+	"strings"
+)
+
+// This mainly comes from https://gist.github.com/adharris/4163702
+
+// StringSlice represents an array of string. The custom type is needed because
+// pq does not support slices yet..
+type StringSlice []string
+
+// for replacing escaped quotes except if it is preceded by a literal backslash
+//  eg "\\" should translate to a quoted element whose value is \
+
+var quoteEscapeRegex = regexp.MustCompile(`([^\\]([\\]{2})*)\\"`)
+
+// Scan convert to a slice of strings
+// http://www.postgresql.org/docs/9.1/static/arrays.html#ARRAYS-IO
+func (s *StringSlice) Scan(src interface{}) error {
+	asBytes, ok := src.([]byte)
+	if !ok {
+		return error(errors.New("Scan source was not []bytes"))
+	}
+	str := string(asBytes)
+
+	// change quote escapes for csv parser
+	str = quoteEscapeRegex.ReplaceAllString(str, `$1""`)
+	str = strings.Replace(str, `\\`, `\`, -1)
+	// remove braces
+	str = str[1 : len(str)-1]
+	csvReader := csv.NewReader(strings.NewReader(str))
+
+	slice, err := csvReader.Read()
+
+	if err != nil {
+		return err
+	}
+
+	(*s) = StringSlice(slice)
+
+	return nil
+}
+
+// Value implements the Valuer interface
+func (s StringSlice) Value() (driver.Value, error) {
+	// string escapes.
+	// \ => \\\
+	// " => \"
+	for i, elem := range s {
+		s[i] = `"` + strings.Replace(strings.Replace(elem, `\`, `\\\`, -1), `"`, `\"`, -1) + `"`
+	}
+	return "{" + strings.Join(s, ",") + "}", nil
+}